How To Get How Many Key Inside A Gson Object Model Class Android?

I have a response that will look like this: 'field_1':{ }, 'field_2' : { 'array_2': [ { ... all other fields }

Solution 1:

Try this...

try {
    int total=0;
    JSONObject json = newJSONObject(field_2);
    Iterator<String> temp = json.keys();
    while (temp.hasNext()) {
        // do your other stuffs here
        total=total+1; //at last you will get total objects in field_2

    }
} catch (JSONException e) {
    e.printStackTrace();
}

OR

JSONObjectobject = newJSONObject (field_2_jsonObject);
JSONArray keys = object.names ();

//KEYS SIZE WILL YOUR TOTAL LENGTH IN "field_2"for (int i = 0; i < keys.length (); i++) {
     String key = keys.getString (i); // Here's your key

 }

Hope this will work... :)

Solution 2:

lets say that your array object like this

publicclassMyObject {
@SerializedName("name")
@Expose
private String name;
@SerializedName("email")
@Expose
private String email;
// other getter and setter
}

so the parsing will be using Gson with retrofit like this

publicclassMyPojo {

    @SerializedName("field_1")
    @ExposeprivateField1 class1;

    @SerializedName("field_2")
    @ExposeprivateField2 class2;

    @SerializedName("field_3")
    @ExposeprivateField3 class3;
    // other getter and setter

}

publicclassField2 {
privateMap<String,List<MyObject>> map=new HashMap<String, List<MyObject>>();
// other getter and setter

}

so the point here is that you don't know how many keys will be like array_1,array_2, ... etc , so you use a map of string which is the key , and the value is your json Object

you can check link1, link2